used for booting (for example) from NAND using nand_spl code.
Signed-off-by: Heiko Schocher hs@denx.de --- arch/arm/cpu/arm926ejs/davinci/dm365_lowlevel.c | 463 ++++++++++++++++++++ arch/arm/include/asm/arch-davinci/dm365_lowlevel.h | 42 ++ 2 files changed, 505 insertions(+), 0 deletions(-) create mode 100644 arch/arm/cpu/arm926ejs/davinci/dm365_lowlevel.c create mode 100644 arch/arm/include/asm/arch-davinci/dm365_lowlevel.h
diff --git a/arch/arm/cpu/arm926ejs/davinci/dm365_lowlevel.c b/arch/arm/cpu/arm926ejs/davinci/dm365_lowlevel.c new file mode 100644 index 0000000..bd32f6b --- /dev/null +++ b/arch/arm/cpu/arm926ejs/davinci/dm365_lowlevel.c @@ -0,0 +1,463 @@ +/* + * SoC-specific lowlevel code for tms320dm365 and similar chips + * Actually used for booting from NAND with nand_spl. + * + * Copyright (C) 2011 + * Heiko Schocher, DENX Software Engineering, hs@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include <common.h> +#include <nand.h> +#include <ns16550.h> +#include <post.h> +#include <asm/arch/dm365_lowlevel.h> +#include <asm/arch/hardware.h> + +void dm365_waitloop(unsigned long loopcnt) +{ + unsigned long i; + + for (i = 0; i < loopcnt; i++) + asm(" NOP"); +} + +int dm365_pll1_init(unsigned long pllmult, unsigned long prediv) +{ + unsigned int clksrc = 0x0; + + /* Power up the PLL */ + clrbits_le32(&dv_pll0_regs->pllctl, PLLCTL_PLLPWRDN); + + clrbits_le32(&dv_pll0_regs->pllctl, PLLCTL_RES_9); + setbits_le32(&dv_pll0_regs->pllctl, clksrc << 8); + + /* + * Set PLLENSRC '0', PLL Enable(PLLEN) selection is controlled + * through MMR + */ + clrbits_le32(&dv_pll0_regs->pllctl, PLLCTL_PLLENSRC); + + /* Set PLLEN=0 => PLL BYPASS MODE */ + clrbits_le32(&dv_pll0_regs->pllctl, PLLCTL_PLLEN); + + dm365_waitloop(150); + + /* PLLRST=1(reset assert) */ + setbits_le32(&dv_pll0_regs->pllctl, PLLCTL_PLLRST); + + dm365_waitloop(300); + + /*Bring PLL out of Reset*/ + clrbits_le32(&dv_pll0_regs->pllctl, PLLCTL_PLLRST); + + /* Program the Multiper and Pre-Divider for PLL1 */ + writel(pllmult, &dv_pll0_regs->pllm); + writel(prediv, &dv_pll0_regs->prediv); + + /* Assert TENABLE = 1, TENABLEDIV = 1, TINITZ = 1 */ + writel(PLLSECCTL_STOPMODE | PLLSECCTL_TENABLEDIV | PLLSECCTL_TENABLE | + PLLSECCTL_TINITZ, &dv_pll0_regs->secctl); + /* Assert TENABLE = 1, TENABLEDIV = 1, TINITZ = 0 */ + writel(PLLSECCTL_STOPMODE | PLLSECCTL_TENABLEDIV | PLLSECCTL_TENABLE, + &dv_pll0_regs->secctl); + /* Assert TENABLE = 0, TENABLEDIV = 0, TINITZ = 0 */ + writel(PLLSECCTL_STOPMODE, &dv_pll0_regs->secctl); + /* Assert TENABLE = 0, TENABLEDIV = 0, TINITZ = 1 */ + writel(PLLSECCTL_STOPMODE | PLLSECCTL_TINITZ, &dv_pll0_regs->secctl); + + /* Program the PostDiv for PLL1 */ + writel(0x8000, &dv_pll0_regs->postdiv); + + /* Post divider setting for PLL1 */ + writel(CONFIG_SYS_DM36x_PLL1_PLLDIV1, &dv_pll0_regs->plldiv1); + writel(CONFIG_SYS_DM36x_PLL1_PLLDIV2, &dv_pll0_regs->plldiv2); + writel(CONFIG_SYS_DM36x_PLL1_PLLDIV3, &dv_pll0_regs->plldiv3); + writel(CONFIG_SYS_DM36x_PLL1_PLLDIV4, &dv_pll0_regs->plldiv4); + writel(CONFIG_SYS_DM36x_PLL1_PLLDIV5, &dv_pll0_regs->plldiv5); + writel(CONFIG_SYS_DM36x_PLL1_PLLDIV6, &dv_pll0_regs->plldiv6); + writel(CONFIG_SYS_DM36x_PLL1_PLLDIV7, &dv_pll0_regs->plldiv7); + writel(CONFIG_SYS_DM36x_PLL1_PLLDIV8, &dv_pll0_regs->plldiv8); + writel(CONFIG_SYS_DM36x_PLL1_PLLDIV9, &dv_pll0_regs->plldiv9); + + dm365_waitloop(300); + + /* Set the GOSET bit */ + writel(PLLCMD_GOSET, &dv_pll0_regs->pllcmd); /* Go */ + + dm365_waitloop(300); + + /* Wait for PLL to LOCK */ + while (!((readl(&dv_sys_module_regs->pll0_config) & PLL0_LOCK) + == PLL0_LOCK)) + ; + + /* Enable the PLL Bit of PLLCTL*/ + setbits_le32(&dv_pll0_regs->pllctl, PLLCTL_PLLEN); + + return 0; +} + +int dm365_pll2_init(unsigned long pllm, unsigned long prediv) +{ + unsigned int clksrc = 0x0; + + /* Power up the PLL*/ + clrbits_le32(&dv_pll1_regs->pllctl, PLLCTL_PLLPWRDN); + + /* + * Select the Clock Mode as Onchip Oscilator or External Clock on + * MXI pin + * VDB has input on MXI pin + */ + clrbits_le32(&dv_pll1_regs->pllctl, PLLCTL_RES_9); + setbits_le32(&dv_pll1_regs->pllctl, clksrc << 8); + + /* + * Set PLLENSRC '0', PLL Enable(PLLEN) selection is controlled + * through MMR + */ + clrbits_le32(&dv_pll1_regs->pllctl, PLLCTL_PLLENSRC); + + /* Set PLLEN=0 => PLL BYPASS MODE */ + clrbits_le32(&dv_pll1_regs->pllctl, PLLCTL_PLLEN); + + dm365_waitloop(50); + + /* PLLRST=1(reset assert) */ + setbits_le32(&dv_pll1_regs->pllctl, PLLCTL_PLLRST); + + dm365_waitloop(300); + + /* Bring PLL out of Reset */ + clrbits_le32(&dv_pll1_regs->pllctl, PLLCTL_PLLRST); + + /* Program the Multiper and Pre-Divider for PLL2 */ + writel(pllm, &dv_pll1_regs->pllm); + writel(prediv, &dv_pll1_regs->prediv); + + writel(0x8000, &dv_pll1_regs->postdiv); + + /* Assert TENABLE = 1, TENABLEDIV = 1, TINITZ = 1 */ + writel(PLLSECCTL_STOPMODE | PLLSECCTL_TENABLEDIV | PLLSECCTL_TENABLE | + PLLSECCTL_TINITZ, &dv_pll1_regs->secctl); + /* Assert TENABLE = 1, TENABLEDIV = 1, TINITZ = 0 */ + writel(PLLSECCTL_STOPMODE | PLLSECCTL_TENABLEDIV | PLLSECCTL_TENABLE, + &dv_pll1_regs->secctl); + /* Assert TENABLE = 0, TENABLEDIV = 0, TINITZ = 0 */ + writel(PLLSECCTL_STOPMODE, &dv_pll1_regs->secctl); + /* Assert TENABLE = 0, TENABLEDIV = 0, TINITZ = 1 */ + writel(PLLSECCTL_STOPMODE | PLLSECCTL_TINITZ, &dv_pll1_regs->secctl); + + /* Post divider setting for PLL2 */ + writel(CONFIG_SYS_DM36x_PLL2_PLLDIV1, &dv_pll1_regs->plldiv1); + writel(CONFIG_SYS_DM36x_PLL2_PLLDIV2, &dv_pll1_regs->plldiv2); + writel(CONFIG_SYS_DM36x_PLL2_PLLDIV3, &dv_pll1_regs->plldiv3); + writel(CONFIG_SYS_DM36x_PLL2_PLLDIV4, &dv_pll1_regs->plldiv4); + writel(CONFIG_SYS_DM36x_PLL2_PLLDIV5, &dv_pll1_regs->plldiv5); + + /* GoCmd for PostDivider to take effect */ + writel(PLLCMD_GOSET, &dv_pll1_regs->pllcmd); + + dm365_waitloop(150); + + /* Wait for PLL to LOCK */ + while (!((readl(&dv_sys_module_regs->pll1_config) & PLL1_LOCK) + == PLL1_LOCK)) + ; + + dm365_waitloop(4100); + + /* Enable the PLL2 */ + setbits_le32(&dv_pll1_regs->pllctl, PLLCTL_PLLEN); + + /* do this after PLL's have been set up */ + writel(CONFIG_SYS_DM36x_PERI_CLK_CTRL, + &dv_sys_module_regs->peri_clkctl); + + return 0; +} + +void dm365_lpc_transition(unsigned char module, unsigned char domain, + unsigned char state) +{ + /* Wait for any outstanding transition to complete */ + while ((readl(&dv_psc_regs->ptstat)) & (PSC_GOSTAT << domain)) + ; + + /* If we are already in that state, just return */ + if (((readl(&dv_psc_regs->mdstat[module])) & PSC_MD_STATE_MSK) + == state) + return; + + /* Perform transition */ + writel(((readl(&dv_psc_regs->mdctl[module])) & (~PSC_MD_STATE_MSK)) | + state, &dv_psc_regs->mdctl[module]); + setbits_le32(&dv_psc_regs->ptcmd, (PSC_CMD_GO << domain)); + + /* Wait for transition to complete */ + while ((readl(&dv_psc_regs->ptstat)) & (PSC_GOSTAT << domain)) + ; + + /* Wait and verify the state */ + while (((readl(&dv_psc_regs->mdstat[module])) & PSC_MD_STATE_MSK) + != state) + ; +} + +int dm365_ddr_setup(void) +{ + dm365_lpc_transition(LPSC_DDR2, 0, PSC_ENABLE); + clrbits_le32(&dv_sys_module_regs->vtpiocr, + VPTIO_IOPWRDN | VPTIO_CLRZ | VPTIO_LOCK | VPTIO_PWRDN); + + /* Set bit CLRZ (bit 13) */ + setbits_le32(&dv_sys_module_regs->vtpiocr, VPTIO_CLRZ); + + /* Check VTP READY Status */ + while (!(readl(&dv_sys_module_regs->vtpiocr) & VPTIO_RDY)) + ; + + /* Set bit VTP_IOPWRDWN bit 14 for DDR input buffers) */ + setbits_le32(&dv_sys_module_regs->vtpiocr, VPTIO_IOPWRDN); + + /* Set bit LOCK(bit7) */ + setbits_le32(&dv_sys_module_regs->vtpiocr, VPTIO_LOCK); + + /* + * Powerdown VTP as it is locked (bit 6) + * Set bit VTP_IOPWRDWN bit 14 for DDR input buffers) + */ + setbits_le32(&dv_sys_module_regs->vtpiocr, + VPTIO_IOPWRDN | VPTIO_PWRDN); + + /* Wait for calibration to complete */ + dm365_waitloop(150); + + /* Set the DDR2 to synreset, then enable it again */ + dm365_lpc_transition(LPSC_DDR2, 0, PSC_SYNCRESET); + dm365_lpc_transition(LPSC_DDR2, 0, PSC_ENABLE); + + writel(CONFIG_SYS_DM36x_DDR2_DDRPHYCR, &dv_ddr2_regs_ctrl->ddrphycr); + + /* Program SDRAM Bank Config Register */ + writel((CONFIG_SYS_DM36x_DDR2_SDBCR | DM36x_DDR_BOOTUNLOCK), + &dv_ddr2_regs_ctrl->sdbcr); + writel((CONFIG_SYS_DM36x_DDR2_SDBCR | DM36x_DDR_TIMUNLOCK), + &dv_ddr2_regs_ctrl->sdbcr); + + /* Program SDRAM Timing Control Register1 */ + writel(CONFIG_SYS_DM36x_DDR2_SDTIMR, &dv_ddr2_regs_ctrl->sdtimr); + /* Program SDRAM Timing Control Register2 */ + writel(CONFIG_SYS_DM36x_DDR2_SDTIMR2, &dv_ddr2_regs_ctrl->sdtimr2); + + writel(CONFIG_SYS_DM36x_DDR2_PBBPR, &dv_ddr2_regs_ctrl->pbbpr); + + writel(CONFIG_SYS_DM36x_DDR2_SDBCR, &dv_ddr2_regs_ctrl->sdbcr); + + /* Program SDRAM Refresh Control Register */ + writel(CONFIG_SYS_DM36x_DDR2_SDRCR, &dv_ddr2_regs_ctrl->sdrcr); + + dm365_lpc_transition(LPSC_DDR2, 0, PSC_SYNCRESET); + dm365_lpc_transition(LPSC_DDR2, 0, PSC_ENABLE); + + return 0; +} + +void dm365_vpss_sync_reset(void) +{ + unsigned int PdNum = 0; + + /* VPSS_CLKMD 1:1 */ + setbits_le32(&dv_sys_module_regs->vpss_clkctl, + VPSS_CLK_CTL_VPSS_CLKMD); + + /* LPSC SyncReset DDR Clock Enable */ + writel(((readl(&dv_psc_regs->mdctl[47]) & ~PSC_MD_STATE_MSK) | + PSC_SYNCRESET), &dv_psc_regs->mdctl[47]); + + writel((1 << PdNum), &dv_psc_regs->ptcmd); + + while (!(((readl(&dv_psc_regs->ptstat) >> PdNum) & PSC_GOSTAT) == 0)) + ; + while (!((readl(&dv_psc_regs->mdstat[47]) & PSC_MD_STATE_MSK) == + PSC_SYNCRESET)) + ; +} + +void dm365_por_reset(void) +{ + if (readl(&dv_pll0_regs->rstype) & 3) + dm365_vpss_sync_reset(); +} + +void dm365_psc_init(void) +{ + unsigned char i = 0; + unsigned char lpsc_start; + unsigned char lpsc_end, lpscgroup, lpscmin, lpscmax; + unsigned int PdNum = 0; + + lpscmin = 0; + lpscmax = 2; + + for (lpscgroup = lpscmin; lpscgroup <= lpscmax; lpscgroup++) { + if (lpscgroup == 0) { + lpsc_start = 0; /* Enabling LPSC 3 to 28 SCR first */ + lpsc_end = 28; + } else if (lpscgroup == 1) { /* Skip locked LPSCs [29-37] */ + lpsc_start = 38; + lpsc_end = 47; + } else { + lpsc_start = 50; + lpsc_end = 51; + } + + /* NEXT=0x3, Enable LPSC's */ + for (i = lpsc_start; i <= lpsc_end; i++) + setbits_le32(&dv_psc_regs->mdctl[i], 0x3); + + /* + * Program goctl to start transition sequence for LPSCs + * CSL_PSC_0_REGS->PTCMD = (1<<PdNum); Kick off Power + * Domain 0 Modules + */ + writel((1 << PdNum), &dv_psc_regs->ptcmd); + + /* + * Wait for GOSTAT = NO TRANSITION from PSC for Powerdomain 0 + */ + while (!(((readl(&dv_psc_regs->ptstat) >> PdNum) & PSC_GOSTAT) + == 0)) + ; + + /* Wait for MODSTAT = ENABLE from LPSC's */ + for (i = lpsc_start; i <= lpsc_end; i++) + while (!((readl(&dv_psc_regs->mdstat[i]) & + PSC_MD_STATE_MSK) == 0x3)) + ; + } +} + +static void dm365_emif_init(void) +{ + writel(CONFIG_SYS_DM36x_AWCCR, &davinci_emif_regs->awccr); + writel(CONFIG_SYS_DM36x_AB1CR, &davinci_emif_regs->ab1cr); + + setbits_le32(&davinci_emif_regs->nandfcr, 1); + + writel(CONFIG_SYS_DM36x_AB1CR, &davinci_emif_regs->ab2cr); + + return; +} + +void dm365_pinmux_ctl(unsigned long offset, unsigned long mask, + unsigned long value) +{ + clrbits_le32(&dv_sys_module_regs->pinmux[offset], mask); + setbits_le32(&dv_sys_module_regs->pinmux[offset], (mask & value)); +} + +__attribute__((weak)) +void board_gpio_init(void) +{ + return; +} + +void board_init_f(ulong bootflag) +{ + /* + * copied from arch/arm/cpu/arm926ejs/start.S + * + * flush v4 I/D caches + */ + asm("mov r0, #0"); + asm("mcr p15, 0, r0, c7, c7, 0"); /* flush v3/v4 cache */ + asm("mcr p15, 0, r0, c8, c7, 0"); /* flush v4 TLB */ + + /* + * disable MMU stuff and caches + */ + asm("mrc p15, 0, r0, c1, c0, 0"); + /* clear bits 13, 9:8 (--V- --RS) */ + asm("bic r0, r0, #0x00002300"); + /* clear bits 7, 2:0 (B--- -CAM) */ + asm("bic r0, r0, #0x00000087"); + /* set bit 2 (A) Align */ + asm("orr r0, r0, #0x00000002"); + /* set bit 12 (I) I-Cache */ + asm("orr r0, r0, #0x00001000"); + asm("mcr p15, 0, r0, c1, c0, 0"); + + /* Mask all interrupts */ + writel(0x04, &dv_aintc_regs->intctl); + writel(0x0, &dv_aintc_regs->eabase); + writel(0x0, &dv_aintc_regs->eint0); + writel(0x0, &dv_aintc_regs->eint1); + + /* Clear all interrupts */ + writel(0xffffffff, &dv_aintc_regs->fiq0); + writel(0xffffffff, &dv_aintc_regs->fiq1); + writel(0xffffffff, &dv_aintc_regs->irq0); + writel(0xffffffff, &dv_aintc_regs->irq1); + + /* System PSC setup - enable all */ + dm365_psc_init(); + + /* Setup Pinmux */ + dm365_pinmux_ctl(0, 0xFFFFFFFF, CONFIG_SYS_DM36x_PINMUX0); + dm365_pinmux_ctl(1, 0xFFFFFFFF, CONFIG_SYS_DM36x_PINMUX1); + dm365_pinmux_ctl(2, 0xFFFFFFFF, CONFIG_SYS_DM36x_PINMUX2); + dm365_pinmux_ctl(3, 0xFFFFFFFF, CONFIG_SYS_DM36x_PINMUX3); + dm365_pinmux_ctl(4, 0xFFFFFFFF, CONFIG_SYS_DM36x_PINMUX4); + + /* PLL setup */ + dm365_pll1_init(CONFIG_SYS_DM36x_PLL1_PLLM, + CONFIG_SYS_DM36x_PLL1_PREDIV); + dm365_pll2_init(CONFIG_SYS_DM36x_PLL2_PLLM, + CONFIG_SYS_DM36x_PLL2_PREDIV); + + /* GPIO setup */ + board_gpio_init(); + + NS16550_init((NS16550_t)(CONFIG_SYS_NS16550_COM1), + CONFIG_SYS_NS16550_CLK / 16 / CONFIG_BAUDRATE); + + /* + * Fix Power and Emulation Management Register + * see sprufh2.pdf page 38 Table 22 + */ + writel(0x0000e003, (CONFIG_SYS_NS16550_COM1 + 0x30)); + puts("ddr init\n"); + dm365_ddr_setup(); + + puts("emif init\n"); + dm365_emif_init(); + + puts("Nand boot...\n"); + +#if defined(CONFIG_POST) + /* + * Do memory tests, calls arch_memory_failure_handle() + * if error detected. + */ + memory_post_test(0); +#endif + + nand_boot(); +} diff --git a/arch/arm/include/asm/arch-davinci/dm365_lowlevel.h b/arch/arm/include/asm/arch-davinci/dm365_lowlevel.h new file mode 100644 index 0000000..f0cfc24 --- /dev/null +++ b/arch/arm/include/asm/arch-davinci/dm365_lowlevel.h @@ -0,0 +1,42 @@ +/* + * SoC-specific lowlevel code for tms320dm365 and similar chips + * + * Copyright (C) 2011 + * Heiko Schocher, DENX Software Engineering, hs@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#ifndef __DM365_LOWLEVEL_H +#define __DM365_LOWLEVEL_H + +#include <common.h> +#include <asm/arch/hardware.h> +#include <asm/io.h> + +void dm365_waitloop(unsigned long loopcnt); +int dm365_pll1_init(unsigned long pllmult, unsigned long prediv); +int dm365_pll2_init(unsigned long pllm, unsigned long prediv); +void dm365_lpc_transition(unsigned char module, unsigned char domain, + unsigned char state); +int dm365_ddr_setup(void); +void dm365_por_reset(void); +void dm365_psc_init(void); +void dm365_pinmux_ctl(unsigned long offset, unsigned long mask, + unsigned long value); + +#endif /* #ifndef __DM365_LOWLEVEL_H */